A pharyngeal puch that is between the pharyngeal arches 2 and 3. [ https://www.worldcat.org/search?q=bn%3A0124020607 http://www.ncbi.nlm.nih.gov/pubmed/16313389 ]
Synonyms: second visceral pouch 2nd arch branchial pouch endoderm pharyngeal pouches 2 2nd pharyngeal pouch endoderm second arch pharyngeal pouch visceral pouch 2 2nd branchial pouch 2nd arch branchial pouch 2nd arch pouch endoderm
Term information
- AAO:0011115
- TAO:0001130
- NCIT:C34289
- RETIRED_EHDAA2:0000060
- null:http://en.wikipedia.org/wiki/Pharyngeal_pouch_(embryology)#Second_pouch
- FMA:295676
- UMLS:C0231069 (ncithesaurus:Second_Pharyngeal_Pouch)
- EHDAA2:0000058
- null:http://linkedlifedata.com/resource/umls/id/C0231069
- VHOG:0000561
- XAO:0000247
- null:http://www.snomedbrowser.com/Codes/Details/345349000
- EMAPA:16275
- EMAPA:16276
- VHOG:0000967
- EFO:0003633
- ZFA:0001130
efo_slim, pheno_slim, vertebrate_core
Contributes to the middle ear, epithelial lining of Crypts (spaces) of the palatine tonsils, supplied by the facial nerve
Second of the pharyngeal (endodermal) evaginations between the visceral arches from which the Eustachian tube is derived; pouches 2-4 open as gill slits.[AAO]
A pouch that is situated between the 2nd and 3rd pharyngeal arch. [ISBN:0124020607][VHOG]
A conserved feature of all vertebrate embryos is the presence of a series of bulges on the lateral surface of the head, the pharyngeal arches; it is within these structures that the nerves, muscles and skeletal components of the pharyngeal apparatus are laid down. The pharyngeal arches are separated by endodermal outpocketings, the pharyngeal pouches.[well established][VHOG]
the dorsal elongation of the second pouch endoderm of all mammals, with the exception of rodents, gives rise to the epithelial lining of palatine tonsils; in rodents, the ventral portion of the second pouch appears to degenerate whereas the remaining part is incorporated into the lateral border of the pharynx; it appears that rodents no longer require tonsils as their function is carried out by the NALT (Nose/Nasal-Associated Lymphoid Tissue) system in the upper respiratory tract.
Term relations
- pharyngeal pouch and has part some (part of some pharyngeal arch 2) and has part some (part of some pharyngeal arch 3)
- pharyngeal pouch
- has part some (part of some pharyngeal arch 3)
- has part some (part of some pharyngeal arch 2)